GORILLA AND CHIMPANZEE 573 however, so marked as in Man, and the phrase " Ex pede Hercnlem " has heen aptly supplemented by " Ex calce hominem." The hair upon the head forms a kind of crest, which can be elevated when the animal is enraged. The neck is thick and short, and the beast has massive shoulders and a broad chest. If it were not for the fewness of the Anthropoid Apes, and their nearness to Man, it is doubtful whether the Gorilla would be ranked as a distinct genus,1 for In internal structure it is FIG. 274.—Gorilla, Gorilla gorilla, ? . x %, very near the Chimpanzee. The microscopic character of the investigations into the anatomy of Man have somewhat dimmed the proper sense of perspective, and have tended to throw into greater prominence than seems necessary the divergences of structure seen in the Gorilla. Dr. Keith 2 has recently summed up and commented upon these divergences, and the following account of this Anthropoid is mainly deduced from his memoir. The cranial capacity of the Gorilla is greater than that of the Chimpanzee. It is not possible, however, to decide from this point of view whether a given skull is that of one or of the other of these Apes. Some Chimpanzees are higher in capacity 1 It is not so ranked by everybody. 3 P/*oe* Zool. Soc. 1899, p. 296.